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Biomedical subjects

B M Baker

Publications and source records attributed to B M Baker.

At least 19 recordsLinked to original sources
PubMed1995

Low-energy internal cardioversion for atrial fibrillation resistant to external cardioversion.

UNLABELLED: Internal Cardioversion. INTRODUCTION: This report describes the electrical conversion of atrial fibrillation in two morbidly obese patients refractory to external cardioversion at 360 J. METHODS AND RESULTS: The two patients were lightly sedated and underwent placement of decapolar catheters in the coronary sinus and right atrial appendage. All ten electrodes of each decapolar catheter were electrically coupled, and defibrillation was attempted at successively increasing levels using a biphasic decaying exponential waveform generated by an external defibrillator. Both patients were returned to normal sinus rhythm using < or = 10 J without complication. CONCLUSION: Internal cardioversion is effective in restoration of sinus rhythm in some patients refractory to conventional forms of therapy.

Aged↗
PubMed1991

Long-term postoperative dysphagia in oral/pharyngeal surgery patients: subjects' perceptions vs. videofluoroscopic observations.

Dysphagia commonly results from surgical resection of various structures within the oral, pharyngeal, and esophageal areas. The type and severity of swallowing dysfunction are based largely on the number and quantity of structures removed as well as the reconstructive procedure. Short term-recovery has been addressed in many studies. However, follow-up studies of long-term functional results and continuing swallowing problems following oral/pharyngeal surgery are unavailable. In this study, perception of swallowing dysfunction was compared with actual videofluoroscopic findings in subjects at least 1 year after oral/pharyngeal surgery. The comparative results of a questionnaire developed to evaluate patients' perception of continuing swallowing difficulty and an analysis of actual videofluoroscopic tapes indicated that the degree or type of dysphagia could not be determined from patients' subjective descriptions of the swallowing problem.

Adult↗
PubMed1985

Palatal insufficiency: a surgical technique for reconstruction.

Nasal regurgitation and hypernasality are the major complications after extirpation of the soft palate, retromolar trigone, and tonsillar areas. The surgical procedure described herein provides satisfactory correction of the defect. The combined approach of advancement-rotation palatoplasty and an advanced lateral pharyngeal wall flap appears to be an alternative solution to the use of an obturator or inferiorly based pharyngeal flap.

Carcinoma, Squamous Cell↗
PubMed1981

Persistent hoarseness after surgical removal of vocal cord lesions.

Surgical intervention to remove vocal cord lesions usually results in normal vocal cord quality postoperatively. However, some patients exhibit persistent hoarseness after surgery, and often they are referred to a speech pathologist for vocal rehabilitation. In this study, factors were identified in the case histories, surgical management, and behavior during voice rest of patients who experienced persistent hoarseness postoperatively. Eight of ten adult subjects were interviewed and their voices were tape-recorded before and after surgery and were determined to be hoarse postoperatively. Cumulative medical history was the only significant factor that related to persistent hoarseness. Medical histories of disease or infection affecting the respiratory tract were among the specific factors that were identified. Results indicate that patients with these medical factors should be counseled about the risk of persistent hoarseness after surgery.

Adult↗
PubMed1978

Structure of mutagen nucleic acid complexes in solution. Proton chemical shifts in 9-aminoacridine complexes with dG-dC, dC-dG, and dA-dT-dG-dC-dA-dT.

The influence of self-complementary oligodeoxynucleotides on the chemical shifts of protons of the mutagenic acridine dye 9-aminoacridine has been measured. Upfield shifts indicative of intercalative binding are found in the cases of dG-dC, dC-dG, and dA-dT-dG-dC-dA-dT but not in dA-dT. Geometries for the complexes that are compatibile with the chemical-shift data and the X-ray structure of the complex between ri5C-rG and 9-aminoacridine determined by Sakore et al. [Sakore, T.D., Jain, S.C., Tsai, C., and Sobell, H.M. (1977), Proc. Natl. Acad. Sci. U.S.A. 74, 188--192] can be identified using recent theoretical estimates of shifts induced by nucleotide bases.

Acridines↗
PubMed1978

E. Cowles Andrus.

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Cardiology↗